CN101938467A - Communication system and method for supporting internetwork multimedia session splitting realization - Google Patents
Communication system and method for supporting internetwork multimedia session splitting realization Download PDFInfo
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Abstract
The invention discloses a communication system and a communication method for supporting internetwork multimedia session splitting realization. The system comprises an IP multimedia subsystem (IMS)-based multimedia session splitting server, a circuit switched (CS) network, a packed switched (PS) network, various internet access networks, and a single-mode terminal and a multi-model terminal, wherein the CS network is connected to an IMS; the various internet access networks comprise WiFi, WiMAX and xDSL; the single-mode terminal and the multi-model terminal are connected to one or more of access networks; and the multimedia session splitting server is provided with a message transceiver module, a registration module, a decision-making module and a session splitting module. The invention also provides a method for splitting a multimedia session by using the system, and connecting the split multiple sessions to two or more terminals or different network interfaces of the same terminal. The communication system and the communication method realize the transmission of different media through the proper network thereof, so that the aims of effective network resource use, load balancing, connection reliability, service continuity, service transparency and the like are fulfilled, and the service fusion among different networks is realized.
Description
Technical field
The present invention relates to a kind of communication system and method for supporting the realization Multimedia session fractionation of across a network, belong to communication technical field.
Background technology
IP multimedia system IMS (IP Multimedia Subsystem) is the conversation control system of a dialogue-based initiation protocol SIP, the IMS system adopts Session Initiation Protocol as the signaling of calling out control and professional control, and with IP network as core network, support the fixing access that inserts and move simultaneously, and access way is not limited to the cellular radio interface, also can be wireless WLAN or wired technology such as LAN, DSL.The terminal of IMS system can be mobile telephone terminal, fixed telephone terminal, multimedia terminal or PC etc.IMS can satisfy the multimedia service demand more novel, more individuation of present many terminal clients.
The centralized traffic ICS of IMS (IMS Centralized Services) is that a kind of professional and professional control all provides communication service based on IMS mechanism to all, and, when business is used CS (circuit switching) network insertion as media bearer, make this business also can use the IMS service.
Prior art related to the present invention is " a kind of conversation combining method of multimedia conversation continuity business " (Chinese patent application number 200810000368.2), this technical scheme is according to user's request certain session S1 and other sessions in the multimedia service to be merged, in merging request, comprise instruction with session S1 and other merged session, after application server receives this merging request, judge according to local policy earlier, as allowing session S1 and other sessions are merged, then after the conversation request of receiving these all sessions that need merge of terminal of initiating merging, just with session S1 and other merged session.
The goal of the invention that session among the merged session of above-mentioned prior art and the present invention splits all is to realize multimedia conversation business in order to make full use of different network interconnection techniques.This patent application does not provide the specific implementation technology of merged session.Therefore, provide a kind of concrete technology or method that realizes that merged session or session split, become the new problem of scientific and technical personnel's concern in the industry.And what above-mentioned prior art patent application related to is the merging of session, and the present invention then is the fractionation of session, and, provided the specific implementation method that splits.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of communication system and method for supporting the realization Multimedia session fractionation of across a network, the present invention sets up different media sessions by splitting Multimedia session respectively in different networks connects, make and in an application, can fully utilize the multiple access network technology that comprises that PS access, CS access and the Internets such as WiFi, WiMAX insert, thereby make full use of the advantage of heterogeneous networks, realize comprehensive effects such as high bandwidth, low delay, high reliability, low expense.In addition, after Multimedia session splits, different Media Streams can arrive a plurality of network interfaces of same terminal via heterogeneous networks, perhaps arrive a plurality of different terminals via heterogeneous networks, the feasible terminal of not supporting certain medium, as long as it and other terminal realize combination, but the business of application of multimedia just, thus the expansion multimedia conversation business.
In order to reach the foregoing invention purpose, the invention provides a kind of communication system of supporting the realization Multimedia session fractionation of across a network, it is characterized in that: described system is provided with: the Multimedia session based on IMS (IP Multimedia System) splits server, insert CS (circuit switching) network of IMS, PS (packet switching) network and comprise WiFi, the various the Internets access network of WiMAX and xDSL, and the following two kinds of terminals that connect above-mentioned access network: only support the CS network, PS network or comprise WiFi, the single-mode terminal of WiMAX and certain the Internet access network of xDSL with can set up the multimode terminal that a plurality of networks are connected simultaneously; Described Multimedia session splits server and is provided with the following function module:
The information receiving and transmitting module is used to receive comprise registration, the session that send from IMS and splits the sip message of request and setup requests; After this module received sip message, send corresponding upper layer module to according to type of message: registration message was sent to Registering modules, and non-registered message uploads to decision-making module; This module also is responsible for the sip message that session fractionation module produces is sent in the network;
Registering modules is responsible for receiving the service log-on message that transmits from the information receiving and transmitting module, finishes user's service log-on, and storing user's registered information;
Decision-making module as the control core of server, is used for decision-making and splits rule; After request message was set up in fractionation request message that reception transmits from the information receiving and transmitting module or session, this decision-making module was carried out corresponding decision process according to the type of message that receives or according to the change triggers of network condition;
Session splits module, after being responsible for obtaining decision information from decision-making module, the SDP that carries the message of sending here from the information receiving and transmitting module (Multimedia session descriptions) information is split according to decision information or merges, and make up session foundation and ask.
In order to reach the foregoing invention purpose, the method that the present invention also provides communication system that realization Multimedia session that a kind of the present invention of employing supports across a network splits that the session of multimedia conversation business is split, it is characterized in that: when described method is used for the session of setting up split, can only realize that session splits at the conversation request destination; Comprise following operating procedure:
(1) the terminal initiation session is set up request, and this request is sent to Multimedia session via the network equipment and splits server;
(2) the information receiving and transmitting module of Multimedia session fractionation server receives this session and sets up request, this request is sent to decision-making module carry out decision-making treatment;
(3) decision-making module is uploaded to session with decision information and splits module, and session splits module and sets up request according to the session that the decision information structure sends to the heterogeneous networks interface of a plurality of terminals or same terminal; Request sends to a plurality of terminals or the same terminal of the correspondence in the network via information receiving and transmitting module and IMS heterogeneous networks interface is set up in a plurality of sessions of then structure being finished;
(4) after the heterogeneous networks interface of a plurality of terminals or same terminal receives conversation request message, split server to Multimedia session respectively and return corresponding response message, these response messages are sent to Multimedia session via the network equipment and split server;
(5) the information receiving and transmitting module of Multimedia session fractionation server all is sent to session with these response messages and splits module, after the Multimedia session descriptor SDP that carries in whole response messages that the terminal that session fractionation module is all with this or the heterogeneous networks interface of same terminal return merges, structure carries session foundation request (re) INVITE of the Multimedia session descriptor of merging once more, is used for media re-negotiation;
(6) (re) INVITE of structure turns back to the initiation terminal that request is set up in this session via IMS once more;
(7) after the initiation terminal of this session foundation request receives (re) INVITE, accept this request and back response message; This response message sends Multimedia session to via the network equipment and splits server, and presentation medium is heavily consulted success; At this moment, finish the fractionation of session, between the heterogeneous networks interface of the initiation terminal of this request and a plurality of terminal or same terminal binding, set up the session that transmits different medium respectively.
In order to reach the foregoing invention purpose, the method that the present invention provides communication system that realization Multimedia session that another kind of employing the present invention supports across a network splits that the session of multimedia conversation business is split again, it is characterized in that: when described method is used for the session of having set up split, can split at any end that participates in conversation; Comprise following operating procedure:
(A) set up conversation between a plurality of terminals after, one of them terminal initiation session splits request, this request is sent to Multimedia session fractionation server via the network equipment;
(B) the information receiving and transmitting module of Multimedia session fractionation server receives this session and splits request, this request is sent to decision-making module carry out decision-making treatment;
(C) decision-making module is uploaded to session with decision information and splits module, session splits module is constructed the heterogeneous networks interface that sends to a plurality of terminals or same terminal respectively according to decision information session foundation request, then, a plurality of sessions of structure being finished are set up request and are sent to a plurality of terminals in the network or the heterogeneous networks interface of same terminal respectively via the information receiving and transmitting module and the IMS network equipment;
(D) after the heterogeneous networks interface of a plurality of terminals or same terminal receives this conversation request message respectively, split server to Multimedia session and return corresponding response message respectively; These response messages are sent to Multimedia session via the IMS network equipment and split server;
(E) the information receiving and transmitting module of Multimedia session fractionation server all is sent to session with these response messages and splits module, after session splits the Multimedia session descriptor SDP that carries in whole response messages that module returns the all-network interface and merges, structure carries session foundation request (re) INVITE of the Multimedia session descriptor of merging once more, is used for media re-negotiation;
(F) (re) INVITE of structure turns back to the initiation terminal that this session splits request via IMS once more;
(G) after the initiation terminal of this session fractionation request receives (re) INVITE, accept this request and back response message; This response message sends Multimedia session to via the network equipment and splits server, and presentation medium is heavily consulted success; At this moment, finish the fractionation of session, split in this session between the heterogeneous networks interface of the initiation terminal of request and a plurality of terminal or same terminal binding and set up the session that transmits different medium respectively.
Advantage of the present invention is: the communication system that the present invention supports the realization Multimedia session of across a network to split can provide a kind of based on the business of UNE and the business realizing technology of suitable UNE, based on this technical background, communication system of the present invention splits a Multimedia session, and a plurality of sessions after will splitting are based upon different networks respectively and/or connect different network interfaces, realized that different medium transmit respectively on suitable separately network, effectively utilize Internet resources thereby reach, load balancing, connection reliability, purpose such as service continuity and service transparency, and then realized the integrated services of heterogeneous networks.
The invention allows for the specific implementation method that session splits: the SDP offer in the fractionation request that splits the initiation terminal transmission of asking is split, setting up corresponding session after the fractionation sets up request and sends to different network interfaces, then, the response SDP answer of each network interface is merged in the session change request, return the initiation terminal that sends to the request of fractionation again, realize the media re-negotiation at two ends.
In addition, the present invention provides concrete control or implementation method for a plurality of terminal common service in the Multimedia session of same business.It both can be single terminal or a plurality of terminal of supporting that many networks connect that session of the present invention splits end, also can be not support multimode to connect or do not support the terminal of some multimedia service.Like this, the present invention just can expand the range of application of multimedia service greatly.At last, communication system of the present invention realizes that the fractionation of Multimedia session both can initiatively split session according to network condition or log-on message, also can answer the user to require and split; Very flexibly, convenient.In a word, the present invention has good popularization and application prospect.
Description of drawings
Fig. 1 is that the present invention supports the communication system architecture composition diagram that the realization Multimedia session of across a network splits.
Fig. 2 is the structure composition diagram that the Multimedia session in the communication system of the present invention splits server.
Fig. 3 is the decision flow diagram that Multimedia session of the present invention splits the decision-making module in the server.
Fig. 4 is the application scenarios embodiment sequential chart that communication system of the present invention realizes the Multimedia session method for splitting.
Fig. 5 is the Another application scene embodiment sequential chart that communication system of the present invention realizes the Multimedia session method for splitting.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1, introduce the present invention and support across a network to realize the communication system architecture composition that Multimedia session splits: wherein, the Multimedia session that is in the control core status splits server based on IMS, i.e. the IP multimedia system.Core technology as next generation network, IMS has taken into full account ambulant support, solved simultaneously to move and merged with fixed network, and introduced the important communication mode of differentiation business such as voice, data, the triple fusions of video, IMS has shielded the otherness of bottom-layer network (comprising telecommunications network, the Internet and Broadcasting Cable Network) for the realization of business of the present invention, and, can professionally under the different bearer ability of heterogeneous networks and different media quality, provide video call capability respectively for the present invention realizes that session splits.The network that inserts IMS is divided into multiple: CS network (black phone switching network), PS network (IP network) and comprise the various the Internets access network of WiFi, WiMAX and xDSL etc., and following two kinds of terminals of above-mentioned access network: only support CS network, PS network or comprise the common single-mode terminal of certain the Internet access network of WiFi, WiMAX and xDSL, perhaps can set up the multimode terminal that a plurality of networks connect simultaneously.
Referring to Fig. 2, introduce the structure composition that Multimedia session splits server, it is provided with the following function module:
The information receiving and transmitting module is used to receive the sip message that sends from IMS, comprises that registration, session split request and setup requests etc.; After this module received sip message, send corresponding upper layer module to according to type of message: registration message was sent to Registering modules, and non-registered message uploads to decision-making module; This module also is responsible for the following biography of sip message, and the sip message that session is split the module generation sends in the network.
Registering modules, main being responsible for receives the service log-on message that transmits from the information receiving and transmitting module, finishes user's service log-on, and storage user's log-on message; Before using Multimedia session fractionation business, terminal must be earlier after Multimedia session splits server registration, and it is professional to use Multimedia session to split.
Registering modules is when registration, and is multi-link if terminal is supported, then this terminal need be registered each network connection and attribute thereof, comprises medium type, network type, host-host protocol and the address port of support; This terminal can also be registered the network address and the attribute thereof with other terminal of its binding.
If it is multi-link that terminal is not supported, then this terminal is in when registration, needs registration and the network address of other terminal of its binding and attribute separately thereof, comprises medium type, network type, host-host protocol and the address port of support.
Decision-making module as the control core of server, is used for decision-making and splits rule; Reception is after the fractionation request or session foundation request of the transmission of information receiving and transmitting module, and this decision-making module is carried out corresponding decision process according to the request type that receives or according to the change triggers of network condition.
Session splits module, after being responsible for obtaining decision information from decision-making module, the SDP that carries the message of sending here from the information receiving and transmitting module (Multimedia session descriptions) information is split according to decision information or merges, and make up session foundation and ask.
The decision-making module of introducing below in the server of the present invention triggers two kinds of decision processes carrying out: carry out corresponding decision process according to the request message type that receives or according to the change triggers of network condition.Wherein the content of operation of the latter, the decision process carried out according to the change triggers of network condition is as described below: when the network that perceives conversation one side's terminal when decision-making module has congested generation, from Registering modules, obtain the log-on message of this terminal, select other to be fit to the streamed network of medium that blocks, constitute decision information by the network attribute of choosing then.
Referring to Fig. 3, introduce the detailed process that decision-making module makes decisions according to the request message type that receives:
(1) when the information receiving and transmitting module receives request message, inquires about and judges the type of this request earlier, so that make corresponding operating in view of the above: if session splits request, then execution in step (2); If request, then execution in step (3) are set up in session;
(2) decision-making module obtains the log-on message that terminal is initiated in this request from Registering modules, therefrom obtains this session and splits the corresponding network attribute information of registering of fractionation destination address that request is carried; Redirect execution in step (4);
(3) decision-making module obtains the log-on message of this request purpose terminal from Registering modules, and judge whether this log-on message allows to carry out session and split, if log-on message allows to split session, just check the medium type and the host-host protocol of each network connection attribute of this log-on message, connect according to the medium type selected network again; In selected network connects, select the final selected network of conduct of network state the best then, and know the network attribute of final selected network from log-on message; If log-on message does not allow to split session, then do not split session, finish the decision process of decision-making module;
(4) network attribute that obtains according to above-mentioned steps is constructed corresponding decision information respectively.
Introducing communication system of the present invention below to the method that multimedia conversation business execution session splits is: when two or more terminals are set up Multimedia session, when perhaps two above terminals are being carried out Multimedia session, Multimedia session splits server and can both respond to the initiation terminal that splits request: select the Media Stream transfer path that suits according to local policy, by setting up the fractionation that session is finished in session connection respectively with the heterogeneous networks interface of a plurality of terminals or same terminal binding, and then realize that different Media Streams transmits respectively along different paths separately, and then realize load balancing, connect reliable, continuous and the professional transparent comprehensive purpose of service.
The present invention has two kinds to the application scenarios of the execution session method for splitting of multimedia conversation business, introduces it respectively below in conjunction with two application scenarioss.
First application scenarios (referring to Fig. 4) is when the session of setting up is split, and at this moment, can only realize that session splits at the conversation request destination.Fig. 4 is that terminal UE _ A sets up video session to terminal UE _ B request, and the UE_B registration has been bound two networks and connected, support voice media delivery and video media transmission respectively.So adopt the inventive method that former session is split as voice conversation and video session, and two kinds of medium of voice and video connect on two network interfaces that arrive the UE_B binding via heterogeneous networks respectively, both guarantee the real-time that voice receive, and can guarantee the fluency of video pictures again.
Specifically describe operating procedure embodiment illustrated in fig. 4 below:
The information receiving and transmitting module that step 3, Multimedia session split server receives this session foundation request, this request is sent to decision-making module carry out decision-making treatment, and decision process as shown in Figure 3.In this step, decision-making module triggers the decision process of carrying out according to the type of message that receives and comprises following content of operation:
(3a) decision-making module receives the message that the information receiving and transmitting module is passed on, and this type of message of inspection is that request is set up in session earlier;
(3b) decision-making module obtains the log-on message of this request purpose terminal UE _ B from Registering modules; When this log-on message allows to carry out the session fractionation, check the medium type and the host-host protocol of each network connection attribute of this log-on message, connect according to the medium type selected network again; In selected network connects, select the final selected network of conduct of network state the best then, and know the network attribute of final selected network from log-on message; Do not split when this log-on message does not allow to carry out session, then do not split session, finish the decision process of decision-making module;
(3c) network attribute that obtains according to above-mentioned steps of decision-making module is constructed corresponding decision information respectively.
Decision-making module is uploaded to session with decision information and splits module, and session splits module and constructs respectively at the session of the network connection type of two heterogeneous networks of terminal UE _ B according to decision information and set up request, and its concrete operations the contents are as follows:
(31) connect the medium type of supporting, the corresponding network address and port numbers and host-host protocol thereof according to each network in the decision information, session splits module the Multimedia session descriptor SDP that carries in the received session fractionation request is split, and adds the corresponding network address and port numbers in the conversation media descriptor after fractionation;
(32) session splits two network interface addresses that the destination address that module structure is sent to appointment in the decision information is terminal UE _ B binding and request is set up in the session of port numbers, and two sessions requests of setting up carry respectively and split the corresponding Multimedia session descriptor in back in the step (31); The session of at last structure being finished is set up request and is sent to network interface corresponding in two networks respectively via the information receiving and transmitting module.
Step 4 and 5, Multimedia session split server and send to the IMS network equipment with constructing two sessions request of setting up of finishing in the step 3.
Corresponding heterogeneous networks interface IP address in two networks that step 6 and 7, the IMS network equipment send to terminal UE _ B respectively with this two sessions request of setting up is again bound.
Step 8 and 9, after two network interface addresses of terminal UE _ B receive conversation request message respectively, split server to Multimedia session respectively and return corresponding 200OK response message, carry SDP answer separately in these response messages, respond the SDP offer that transmits in the step 6 and 7.
Step 10 and 11, the response message in the step 8 and 9 is sent to Multimedia session via the IMS network equipment and splits server.
Step 12, the information receiving and transmitting module that Multimedia session splits server all is sent to session fractionation module with these response messages, after session splits the Multimedia session descriptor SDP answer that carries in whole response messages that module returns two heterogeneous networks interfaces of terminal UE _ B and merges, structure carries session foundation request (re) INVITE of the Multimedia session descriptor of merging once more, is used for media re-negotiation.
Step 13 and 14, (re) INVITE of structure sends to UE_A via the IMS network equipment in the step 12.
Step 15 and 16 after terminal UE _ A receives (re) INVITE, is accepted this request and loopback 200OK response message, and this response message sends Multimedia session to via the IMS network equipment and splits server, and presentation medium is heavily consulted success.At this moment, finish session and split, between the network interface 1 of terminal UE _ A and terminal UE _ B binding, set up the voice medium conversation, and between the network interface 2 of terminal UE _ A and terminal UE _ B binding, set up the video media conversation.
Second application scenarios (referring to Fig. 5) is that the video session of having set up is split, and at this moment, can split at any end that participates in conversation.Fig. 5 be terminal UE _ A and terminal UE _ B carry out video calling, the user of UE_B is transformed into video calling on terminal UE _ C from terminal UE _ B, continue the voice call on the maintenance UE_B simultaneously, thereby former session is split into voice conversation and video session, and via the different different terminals of network connection arrival, also can both guarantee the real-time that voice receive, guarantee the fluency of video pictures again.
Specifically describe operating procedure embodiment illustrated in fig. 5 below: terminal UE _ A and the terminal UE _ B of this moment have set up the multimedia conversation;
The information receiving and transmitting module that step 3, Multimedia session split server receives this session fractionation request, this request is sent to decision-making module carry out decision-making treatment; Decision process is referring to shown in Figure 3.In this step, decision-making module triggers the decision process of carrying out according to the request message type that receives and comprises following content of operation:
(3a) decision-making module receives the message that the information receiving and transmitting module is passed on, and checks that earlier type of message is that session splits request;
(3b) decision-making module obtains this session and splits the log-on message of asking to initiate terminal from Registering modules, and therefrom obtains the corresponding network attribute information of registering of fractionation destination address that this session fractionation request is carried;
(3c) network attribute that obtains according to above-mentioned steps of decision-making module is constructed corresponding decision information respectively.
Decision-making module is uploaded to this session with decision information and splits module, session splits module and connects the medium type of supporting, the corresponding network address and port numbers and host-host protocol thereof according to each network in the decision information, split and make up respectively session foundation request at the network connection type of terminal UE _ B and two different terminals of terminal UE _ C, the destination address of request is network link address and the port numbers among the corresponding SDP, and adds respectively and go up corresponding SDP.The session of at last structure being finished is set up request and is sent to network interface corresponding in two terminal UE _ B and the UE_C place network respectively via the information receiving and transmitting module.
The content of operation of step 4～16 among the content of operation of step 4～16 and embodiment Fig. 4 is identical, does not do at this and gives unnecessary details.
Through above-mentioned steps, finish the fractionation of session, between terminal UE _ A and terminal UE _ B, set up the voice medium conversation, between terminal UE _ A and terminal UE _ C, set up the video media conversation.
The above only is two preferred embodiments of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. communication system that the realization Multimedia session of supporting across a network splits, it is characterized in that: described system is provided with: the Multimedia session based on IMS (IP Multimedia System) splits server, insert CS (circuit switching) network of IMS, PS (packet switching) network and comprise WiFi, the various the Internets access network of WiMAX and xDSL, and the following two kinds of terminals that connect above-mentioned access network: only support the CS network, PS network or comprise WiFi, the single-mode terminal of WiMAX and certain the Internet access network of xDSL with can set up the multimode terminal that a plurality of networks are connected simultaneously; Described Multimedia session splits server and is provided with the following function module:
The information receiving and transmitting module is used to receive comprise registration, the session that send from IMS and splits the sip message of request and setup requests; After this module received sip message, send corresponding upper layer module to according to type of message: registration message was sent to Registering modules, and non-registered message uploads to decision-making module; This module also is responsible for the sip message that session fractionation module produces is sent in the network;
Registering modules is responsible for receiving the service log-on message that transmits from the information receiving and transmitting module, finishes user's service log-on, and storing user's registered information;
Decision-making module as the control core of server, is used for decision-making and splits rule; After request message was set up in fractionation request message that reception transmits from the information receiving and transmitting module or session, this decision-making module was carried out corresponding decision process according to the type of message that receives or according to the change triggers of network condition;
Session splits module, after being responsible for obtaining decision information from decision-making module, the SDP that carries the message of sending here from the information receiving and transmitting module (Multimedia session descriptions) information is split according to decision information or merges, and make up session foundation and ask.
2. system according to claim 1 is characterized in that: before using Multimedia session fractionation business, terminal must split server to Multimedia session earlier and register, and then, it is professional to use Multimedia session to split.
3. system according to claim 1, it is characterized in that: described Registering modules is when registration, if it is multi-link that terminal is supported, then this terminal need be registered each network connection and attribute thereof, comprises medium type, network type, host-host protocol and the address port of support; This terminal can also be registered the network address and the attribute thereof with other terminal of its binding; If it is multi-link that terminal is not supported, then this terminal is in when registration, needs registration and the network address of other terminal of its binding and attribute separately thereof, comprises medium type, network type, host-host protocol and the address port of support.
4. system according to claim 1 is characterized in that: described decision-making module triggers the decision process of carrying out two kinds: carry out corresponding decision process according to the type of message that receives or according to the change triggers of network condition; Wherein, the decision process of carrying out according to the change triggers of network condition comprises following content of operation: when the network that perceives conversation one side's terminal when decision-making module has congested generation, from Registering modules, obtain the log-on message of this terminal, the streamed network of the medium of selecting other to be fit to get clogged constitutes decision information by the network attribute of choosing then.
5. the communication system that splits of a realization Multimedia session that adopts the described support across a network of claim 1 method that the session of multimedia conversation business is split, it is characterized in that: when described method is used for the session of setting up split, can only realize that session splits at the conversation request destination; Comprise following operating procedure:
(1) the terminal initiation session is set up request, and this request is sent to Multimedia session via the network equipment and splits server;
(2) the information receiving and transmitting module of Multimedia session fractionation server receives this session and sets up request, this request is sent to decision-making module carry out decision-making treatment;
(3) decision-making module is uploaded to session with decision information and splits module, and session splits module and sets up request according to the session that the decision information structure sends to the heterogeneous networks interface of a plurality of terminals or same terminal; Request sends to a plurality of terminals or the same terminal of the correspondence in the network via information receiving and transmitting module and IMS heterogeneous networks interface is set up in a plurality of sessions of then structure being finished;
(4) after the heterogeneous networks interface of a plurality of terminals or same terminal receives conversation request message, split server to Multimedia session respectively and return corresponding response message, these response messages are sent to Multimedia session via the network equipment and split server;
(5) the information receiving and transmitting module of Multimedia session fractionation server all is sent to session with these response messages and splits module, after the Multimedia session descriptor SDP that carries in whole response messages that the terminal that session fractionation module is all with this or the heterogeneous networks interface of same terminal return merges, structure carries session foundation request (re) INVITE of the Multimedia session descriptor of merging once more, is used for media re-negotiation;
(6) (re) INVITE of structure turns back to the initiation terminal that request is set up in this session via IMS once more;
(7) after the initiation terminal of this session foundation request receives (re) INVITE, accept this request and back response message; This response message sends Multimedia session to via the network equipment and splits server, and presentation medium is heavily consulted success; At this moment, finish the fractionation of session, between the heterogeneous networks interface of the initiation terminal of this request and a plurality of terminal or same terminal binding, set up the session that transmits different medium respectively.
6. method according to claim 5 is characterized in that: described a plurality of terminals are meant two or more terminals.
7. method according to claim 5 is characterized in that: in the described step (2), decision-making module triggers the decision process of carrying out according to the type of message that receives and comprises following content of operation:
(21) the information receiving and transmitting module is sent to decision-making module with the message that receives, and decision-making module checks that type of message is that request is set up in session;
(22) decision-making module obtains the log-on message of this request purpose terminal from Registering modules; When this log-on message allows to carry out the session fractionation, check the medium type and the host-host protocol of each network connection attribute of this log-on message, connect according to the medium type selected network again; In selected network connects, select the final selected network of conduct of network state the best then, and know the network attribute of final selected network from log-on message; Do not split when this log-on message does not allow to carry out session, then do not split session, finish the decision process of decision-making module;
(23) network attribute that obtains according to above-mentioned steps of decision-making module is constructed corresponding decision information respectively.
8. system according to claim 6 is characterized in that: in the described step (3), session fractionation module is constructed the corresponding session request of setting up according to decision information and is further comprised following content of operation:
(31) connect the medium type of supporting, the corresponding network address and port numbers and host-host protocol thereof according to each network in the decision information, session splits module the Multimedia session descriptor SDP that carries in the received session fractionation request is split, and adds the corresponding network address and port numbers in the conversation media descriptor after fractionation;
(32) session splits the session foundation request that module structure is sent to the network interface of appointment in the decision information, and these sessions request of setting up carries the corresponding Multimedia session descriptor in fractionation back in the step (31) respectively; The session of at last structure the being finished request of setting up sends to the information receiving and transmitting module, sends to network interface corresponding in the network respectively by the information receiving and transmitting module.
9. the communication system that splits of a realization Multimedia session that adopts the described support across a network of claim 1 method that the session of multimedia conversation business is split, it is characterized in that: when described method is used for the session of having set up split, can split at any end that participates in conversation; Comprise following operating procedure:
(A) set up conversation between a plurality of terminals after, one of them terminal initiation session splits request, this request is sent to Multimedia session fractionation server via the network equipment;
(B) the information receiving and transmitting module of Multimedia session fractionation server receives this session and splits request, this request is sent to decision-making module carry out decision-making treatment;
(C) decision-making module is uploaded to session with decision information and splits module, session splits module is constructed the heterogeneous networks interface that sends to a plurality of terminals or same terminal respectively according to decision information session foundation request, then, a plurality of sessions of structure being finished are set up request and are sent to a plurality of terminals in the network or the heterogeneous networks interface of same terminal respectively via the information receiving and transmitting module and the IMS network equipment;
(D) after the heterogeneous networks interface of a plurality of terminals or same terminal receives this conversation request message respectively, split server to Multimedia session and return corresponding response message respectively; These response messages are sent to Multimedia session via the IMS network equipment and split server;
(E) the information receiving and transmitting module of Multimedia session fractionation server all is sent to session with these response messages and splits module, after session splits the Multimedia session descriptor SDP that carries in whole response messages that module returns the all-network interface and merges, structure carries session foundation request (re) INVITE of the Multimedia session descriptor of merging once more, is used for media re-negotiation;
(F) (re) INVITE of structure turns back to the initiation terminal that this session splits request via IMS once more;
(G) after the initiation terminal of this session fractionation request receives (re) INVITE, accept this request and back response message; This response message sends Multimedia session to via the network equipment and splits server, and presentation medium is heavily consulted success; At this moment, finish the fractionation of session, split in this session between the heterogeneous networks interface of the initiation terminal of request and a plurality of terminal or same terminal binding and set up the session that transmits different medium respectively.
10. method according to claim 9 is characterized in that: in the described step (B), decision-making module triggers the decision process of carrying out according to the type of message that receives and comprises following content of operation:
(B1) the information receiving and transmitting module is sent to decision-making module with the message that receives, and decision-making module checks that type of message is that session splits request;
(B2) decision-making module obtains this session and splits the log-on message of asking to initiate terminal from Registering modules, and therefrom obtains the corresponding network attribute information of registering of fractionation destination address that this session fractionation request is carried;
(B3) network attribute that obtains according to above-mentioned steps of decision-making module is constructed corresponding decision information respectively.
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